Brake



Patented Apr. 10, 1934 1,954,530

UNITED STATES PATENT OFFICE BRAKE Ludger E. La Brie, South Bend, Ind., assignor to Bendix Brake Company, South Bend, Iml., a corporation of Illinois 7 Application March 25, 1929, SerialNo. 349,598

13 Claims. (01. 188-78) This invention relates to brakes, and is illusthe backing plate. The wedge 30 may if desired trated as embodied in an internal expanding have contacting portions of different inclination automobile brake. An object of the invention to move the shoes at dilferent rates. In the emis to simplify the construction and arrangement bodiment illustrated the wedge portion contactof the parts, more especially when they are ing with the end of shoe 14 has a greater inclinae mounted on a swiveled front wheel, by utilizing tion than the wedge contacting with shoe 16 and as an applying device a wedge or the like movable moves shoe 14 a greater distance toward the perpendicularly toward the backing plate. Vadrum for a given movement of the wedge than rious features of novelty relate to the construcit moves shoe 16. Plunger 32 may be mounted tion of the shoes or the equivalent friction means in a tubular central portion 34 of a bracket hav- 5- with novel end fittings engaging the above-deg side wings 36 frictionally S u d shiftably scribed applying device, and preferably provided to the backing pl y bolts 38 passing through with portions slidably engaging the backing plate slots 40. A flexible steel cable 42, or an equivaand taking the lateral component of the applying lent tension element perpendicular to the backforce, to the structure of these novel end fittings p at p s through t tubular p t 34 and of the wedge, to the construction and ara d through the p r 32 a is Secured t the rangement of the means for operating the wedge, atte by means such as a nut 44. and to various novel and desirable details which Preferably the cable 42 or its equivalent passes will be apparent from the following description through a B w nyp conduit 46, of any desired of the illustrative embodiment shown in the a construction, seated at its end in a novel fitting companying drawing, in which: 48 threaded or otherwise mounted on the end of Figure 1 is a vertical section through the brake, portion 34 of the bracket. A return spring 50 just inside the head of the brake drum, and for wedge 8 is o n d w n fi ing 48 and showing the brake shoes in side elevation; the base of plu 3 Su r u ding cable 42.

Figure 2 is a partial section substantially on n Operation, tension on Cable operates 80 the line 22 of Figure 1, and showing the applywedge 28 against the resistance of return springs ing means; and 20 and 50, to force the shoes apart to apply the.

Figure 3 is a partial section on the line 3-3 brake, the component of force in the direction of Figure 2, showing the construction and mountof the backing plate being taken by the slidable ing of one of the end fittings, engagement of members 24 with the backing 85 The illustrated brake includes a rotatable drum P 10, at the open side of which is a suitable support While one illustrative embodiment has been desuch as a backing plate 1 and within which is scribed in detail, it is not my intention to limit arranged the friction means of thebrake which, the PD 0f the invelltlon to that particular in this particular embodiment, includes a pair of embodlment OFhBrWISB than by the terms of 90 interchangeable shoes 14 and 16 mounted on the P P fixed anchor pivots 18 carried by the backing I clam plate and connected by the usual return spring 20. A brake m m combma' q ing plate carrying frictionmeans havmgadJa- Each of the shoes 14 and 16 has at its upper t rable ends a tension element assinendanovel end fitting shown as a steel stamping a ifi b l t b t n i folded to provide oppositely-projecting flanges 22 t mug 6 ac I a e S an m y mg angles thereto, a sliding plunger connected to 'spot'welded to slde of the Shoe and the tension element between said ends and movcentral double-thickness thrust portion 24 proable perpendicularly to the backing plate, and a 4 Jecting laterally from the shoe and slidably enwedge secured t id plunger and actingon said gaging the backing plate, together with a wedgeends 100 Shaped double-thickness end P i 26 P 2. A brake comprising, in combination, a backing crosswise of the end of the shoe in thrust ing plate carrying friction means having adjgengagement therewith cent separable ends, a tension element passing Between the shoe ends is arranged a novel through the backing plate substantially at right app y device, preferably mcllldlng a double angles thereto, a sliding plunger connected to the wedge 28 having pairs of flanges 30 embracing tension element between said ends and movable the above-described end wedges 26, and carried perpendicularly to the backing plate, and a wedge by or formed integrally on a plunger 32 slidably secured to said plunger and acting on said ends,

mounted for movement perpendicularly toward together abracket shiftably mounted on the backing plate and in which said plunger is slidably supported.

3. A brake comprising, in combination, a backing plate carrying friction means having adjacent separable ends, a tension element passing through the backing plate substantially at right angles thereto, a sliding plunger connected to the tension element between said ends and movable perpendicularly to the backing plate, and a wedge secured to said plunger and acting on said ends, together with a bracket in which said plunger is slidably supported and means frictionally securing the bracket shiftably .to the backing plate.

4. A brake shoe having at its end a thrust device with a portion extending across the end of the shoe, and another portion secured to the side of the shoe, and a third portion extending laterally from the shoe to engage a support and prevent lateral movement of the shoe.

5. A brake shoe having at its end a thrust device with a portion extending across the end of the shoe, and another portion extending laterally from the shoe to engage a support and prevent lateral movement of the shoe.

6. A brake shoe having a steadying device comprising a stamping folded to provide flanges secured to the side of the shoe and continued as a double-thickness portion projecting laterally from the shoe.

7. A brake shoe having a steadying device comprising a stamping having a portion secured to the side of the shoe and continued as a portion projecting laterally from the shoe and also having a portion at the end of the shoe adapted to be engaged by an applying device.

8. A brake shoe having a steadying device projecting laterally from one side and extending crosswise of the end of the shoe as a thrust member engageable with an applying device.

'9. A brake comprising, in combination, a backing plate; friction means having adjacent separable ends and provided adjacent said ends with steadying parts projecting laterally into slidable engagement with the backing plate, and an applying device movable between and in engagement with said ends toward the backing plate and whose component of force in its direction of movement is taken by the engagement of said parts with the backing plate.

10. A brake comprising, in combination, a backing plate; friction means having adjacent separable ends and provided adjacent said ends with steadying parts projecting laterally into slidable engagement with the backing plate, and a wedge movable between and in engagement with said ends toward the backing plate and whose component of force in its direction of movement is taken by. the engagement of said parts with the backing plate.

11. A brake comprising, in combination, a backing plate, shoes having secured at their ends separately-formed stampings having portions projecting laterally into slidable engagement with said plate and having other portions extending across said ends, and an applying de-- vice movable perpendicularly toward the plate and engaging said other portions and forcing the shoes apart, the component of force in the direction of the plate being taken by engagement of the laterally-projecting portions with the plate.

12. A brake comprising, in combination, a backing plate, shoes having secured at their ends separately-formed stampings having portions projecting laterally into slidable engagement with said plate and having other portions extending across said ends, and a wedge movable perpendicularly toward the plate and wedgingly engaging said other portions, the component of force in the direction of the plate being taken by engagement of the laterally-projecting portions with the plate.

13. Brake-applying means comprising, in combination, an applying device including a plunger,

a flexible tension element connected to said plunger, a bracket having a tubular portion slidably embracing the plunger, a Bowden-type conduit enclosing said element and having an end fitting secured to the tubular portion, and a return spring confined between said fitting and the base of the plunger.

LUDGER E. LA BRIE. 

